code: def tearDown(self):
      os.remove(self.json_name)
  
file_path: mmdetection/tests/test_datasets/test_cityscapes.py
imports: import os
  import unittest
  from mmengine.fileio import dump
  from mmdet.datasets import CityscapesDataset
label_desc: Use image node_id 2 for calling the TestCityscapesDataset obj's underlying member method code with example usage: obj.tearDown() without return types